import copy

a=[1,2]
b=[4,5]
c=[a,b]
print(c)
d=copy.copy(c)
print(d)
e=copy.deepcopy(c)
print(e)
print('-'*100)
a=a.append(3)
print(c,id(c),id(c[0]))
print(d,id(d),id(d[0]))
print(e,id(e),id(e[0]))